18289000449 has 40 divisors (see below), whose sum is σ = 29105223840. Its totient is φ = 11411699904.

The previous prime is 18289000417. The next prime is 18289000453. The reversal of 18289000449 is 94400098281.

It is not a de Polignac number, because 18289000449 - 2⁵ = 18289000417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18289000549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 56149 + ... + 199325.

It is an arithmetic number, because the mean of its divisors is an integer number (727630596).

It is a Proth number, since it is equal to 69767 ⋅ 2¹⁸ + 1 and 69767 < 2¹⁸.

Almost surely, 2^18289000449 is an apocalyptic number.

18289000449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

18289000449 is a deficient number, since it is larger than the sum of its proper divisors (10816223391).

18289000449 is a wasteful number, since it uses less digits than its factorization.

18289000449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143291 (or 143282 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 18289000449 in words is "eighteen billion, two hundred eighty-nine million, four hundred forty-nine", and thus it is an aban number.